Saber Marionette J is an anime series created by Satoru Akahori, with original character designs by Tsukasa Kotobuki.

The series is set on Terra II, which is a planet located far from Earth. 300 years before the start of the series, a human colony ship called the Mesopotamia suffered a major disaster, and almost everyone on board was killed. Six men managed to escape by using an escape pod, and managed to land on the planet. These men decided to use clones of themselves to colonize the planet. Six nations were created, with each nation ruled by the six direct clones of the original colonists. The nations are populated by genetically modified clones.

Unfortunately, the equipment was not able to produce female clones from male genetic material, so Terra II's inhabitants created marionettes (which are robots designed to physically resemble females and to fill their role in society). Since they are devoid of personality or sentient behavior, the marionettes are regarded as objects and status symbols.

Otaru Mamiya is the main character in Saber Marionette J. In the first episode of the series, Otaru finds a marionette named Lime. However, unlike other marionettes, she is able to act on her own free will and seems to have her own personality. During the course of the series, Otaru also finds two other marionettes who are like Lime: Cherry and Bloodberry. All three of these special marionettes become infatuated with Otaru and compete for his affection.

Lime has a naive, lively, and playful personality; she tends to act more like a pre-adolescent girl. Cherry is the most maternal of the three special marionettes; she's the perfect stereotype of a Japanese wife, but she is also quite intelligent. Bloodberry is the most aggressive of the three marionettes. She's headstrong, impulsive, and amorous.

In some respects, Saber Marionette J is a harem anime, but it also contains some science fiction elements. This is definitely not a series being aimed at a young audience, even though there are some "cute" character designs being employed for the series. With the subject matter and some of the content in the series, I would personally recommend Saber Marionette J to anime viewers who are 16 or 17 years of age and older.